Machine-box



(No Model.)

J. G. BUZZELL.

MAGHINE 302.

Patented May 5, 1885.

N4 PETERS. Pnowuhu n mr. Washington. 9.8

UNITED STATES PATENT OFFICE,

JOHN G. BUZZELL, OF LYNN, MASSACHUSETTS.

MACHINE-BOX.

SPECIFICATION forming part of Letters Patent No. 317,087, dated May 5,1885.

Application filed January 30, 1885.

To all whom it may concern.-

Be it known that I, JOHN G. BUZZELL, a citizen of the United States,residing at Lynn, in the county of Essex and State of Massachusetts,haveinvented a new and useful Box for use in the Hangers. or Bearings forAxles or Shafts in Machinery, of which the following is a specification.

My invention relates to an improvement in such boxes, usually made ofBabbitt or other composition metal, which surround the shafts or axleswithin the hangers, bearings, or other permanent parts of the machineryfor the purpose of reducing friction; but it has been found that it wasnearly, if not quite,impossible to fit a shaft so carefully to itsbearings that it shall revolve exactly around its mechanical center, andwithout sufficient friction to heat and swell it. WVhen a shaft is madeto revolve rapidly, especially if it is weighted with; pulleys or othermechanism, it has a tendency to revolve around its center of weight,whereby the shaft generally acquires an eccentric movement. It alsorequires a great expenditure of fine and costly labor to finish thecircumference of the shaft to true circles. If these difficulties arenot overcome, the shaft will either rattle in its box, causing a greatnoise and jar to the machinery, preyenting fine work, or, if fittedtightly, it will quickly heat and swell, so as to stop the machinery orcause great injury. N 0 box now in use can remedy these evils, and theyallow more or less of the oil to escape and be thrown about from therevolving shaft. My invention allows of quite a saving in the expense offinishing the cavity in the hanger for the box, as my box does notrequire a nice fit.

The objects of my invention are, first, to increase the efficiency ofthe box in reducing friction; second, to prevent the evil effects of the;heating and swelling of the revolving shafts; third, to allow of theeccentric motion of the shafts; fourth, to reduce the jar and deaden thenoise of the machinery; fifth, to

take up and distribute the waste oil which works out of the box onto theshaft and to return it to the box; sixth, to reduce the expense offitting the inside of the hangers or shells'to the boxes. I attain theseobjects by the mechanism. illustrated in the accompanying drawings, inwhich- (N 0 model.)

Figure 1 represents a box with its covering. Fig. 2 is a view of ahanger or shaft supporter with the upper portion of the shell removed,showing the box in its place and a portion of a shaft with thecircumferential groove and ring. Fig. 3 is a section of the wholearrangement, taken on the line of 0c in Fig. 2.

The same letters refer to like parts in th several views.

My invention primarily consists in surrounding the friction box A with aband or bands of felt or other suitable semi-elastic substance, B, sothat it shall not be rigidly held in the shell 0 of thepermanent'machinery. I also cut a few holes, a a a, through the box,which are filled with felt or other substance of a similar character forthe purpose of affording a free passage to the oil. Around the shaft ateach end of the box I either cut a shallow circumferential groove or fiton a ring or collar, d. When the oil escapes from the box, this ring orgroove stops its passage along the shaft, and the centrifugal forcethrows it into a cavity, D, cut in the shell 0 at each end of the box,from whence it passes to the felt, and,being filtered through the felt,passes again to the box through the holes a a to lubricate the shaft..The shell or bearing 0 is made in two parts, one removable, as usual,and they are secured together by a screw or bolt, f, and pin g. Theinterior of the shell does not require, in my invention, such carefulfitting to the box as is necessary with other boxes, and a great savingis made by me in labor. Through one part of the shell, felt, and box ismade an opening, N, for an oil-cup.

By this invention I produce a box which allows of a closer fit to theshaft than could otherwise be used, as it is well known that thecomposition box will swell faster than the shaft when heated, and willnot bind, because the felt cover allows of the necessary expansion. Theelasticity of the felt also allows of the eccentric movement of theshaft, avoiding all noise and jar, and securing a minimum of friction,all because. the felt covering allows of aslight play and expansion ofthe box, instead of the rigid and unyielding method of holding now inuse.

I prefer to use the collar or ring all, rather than the groove,inconnection with the cavity i or collars-d d, substantially as described,and I 5 D in most cases; but I find that in some cases the groove actsas well, and do not wish to be limited to either.

I do not intend to claim the composition box alone, either with orwithout the holes a a a; but

What I do claim, and desire to secure by Letters Patent as my invention,is

1. The box A, with its outer covering, B, substantially as described,and for the purpose set forth.

2. The combination of the box A, the yielding cover B, the cavities D D,and the rings for the purpose set forth.

3. The combination of the box A, the rings or collars d d, and thecavities D D, substantially as described and set forth.

4, Felt or other suitable semi-elastic sub- 20 stance as a cushionbetween the box and the unyielding shell, in combination with the box A,substantially as described, and for the purpose set forth.

, JOHN G. BUZZELL.

Witnesses:

CHARLES G. DYER, CHAS. ALLEN TABER.

